Resource Type
Collection
Technical Report Archive and Image Library
87
National Advisory Committee for Aeronautics Collection
60
Office of Scientific & Technical Information Technical Reports
30
Texas Attorney General Opinions
26
TRAIL Microcard Collection
16
Government Documents A to Z Digitization Project
4
Texas State Publications
1
USDA Farmers' Bulletins
1
Serial/Series Title
NACA Research Memorandums
29
NACA Technical Notes
26
Atomic Energy Commission Reports
15
United States Bureau of Mines Reports
4
HW (Series)
3
Hanford Works Reports
3
NACA Technical Reports
3
ORNL (Series)
3
Oak Ridge National Laboratory Reports
3
Report of investigations (United States. Bureau of Mines)
3
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148 Matching Results
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Effects of double-slotted flaps and leading-edge modifications on the low-speed characteristics of a large-scale 45 degrees swept-back wing with and without camber and twist
Report presenting an investigation of two large-scale, semispan, wing-fuselage models with the 0.25-chord line swept back 45 degrees to determine and compare the effects of partial-span, double-slotted flaps on the characteristics of a 45 degree sweptback wing with and without camber and twist. A secondary investigation was also conducted to determine the effects of various full-span, leading-edge modifications on the characteristics of the models with and without the flaps.
Date:
July 23, 1951
Creator:
James, Harry A. & Dew, Joseph K.
Object Type:
Report
System:
The UNT Digital Library
Experimental investigation of typical constant- and variable-area exhaust nozzles and effects on axial-flow turbojet-engine performance
Report presenting testing of several turbojet engines with both constant- and variable-area nozzles to extend full-scale nozzle performance to higher exhaust-nozzle pressure ratios and to investigate the effects of constant- and variable-area nozzles on turbojet-engine operation. Results regarding the different types of nozzles are provided.
Date:
July 9, 1951
Creator:
Wallner, Lewis E. & Wintler, John T.
Object Type:
Report
System:
The UNT Digital Library
A simplified instrument for recording and indicating frequency and intensity of icing conditions encountered in flight
"An instrument for recording and indicating the frequency and intensity of aircraft icing conditions encountered in flight has been developed by the NACA Lewis Laboratory to obtain statistical icing data over world-wide air routes during routine airline operations. The operation of the instrument is based on the creation of a differential pressure between an ice-free total-pressure system and a total-pressure system in which small total-pressure holes vented to static pressure are allowed to plug with ice accretion. The simplicity of this operating principle permits automatic operation, and provides relative freedom from maintenance and operating problems" (p. 1).
Date:
July 3, 1951
Creator:
Perkins, Porter J.; McCullough, Stuart & Lewis, Ralph D.
Object Type:
Report
System:
The UNT Digital Library
The Use of Two-Dimensional Section Data to Estimate the Low-Speed Wing Lift Coefficient at Which Section Stall First Appears on a Swept Wing
Report discusses a procedure for estimating the wing lift coefficient for and spanwise location of the first occurrence of section stall on a swept wing. It has been modified from a method used to calculate the same information for unswept wings. The effects of split flaps, leading-edge modifications, and fences are described.
Date:
July 27, 1951
Creator:
Maki, Ralph L.
Object Type:
Report
System:
The UNT Digital Library
A flight study of requirements for satisfactory lateral oscillatory characteristics of fighter aircraft
Report presenting a pilot-opinion survey conducted with a conventional fighter airplane fitted with special servo devices for varying in flight the dihedral effect, static directional stability, and directional damping. Results showing the boundaries that define satisfactory and tolerable lateral oscillatory characteristics are presented.
Date:
July 25, 1951
Creator:
Liddell, Charles J., Jr.; Creer, Brent Y. & Van Dyke, Rudolph D., Jr.
Object Type:
Report
System:
The UNT Digital Library
Free-Spinning Tunnel Investigation of a 1/20-Scale Model of the McDonnell F2H-3 Airplane
Memorandum presenting an investigation conducted in the 20-foot free-spinning tunnel on a 1/20-scale model of the McDonnell F2H-3 airplane. The effects of control settings and movement on the erect spin and recovery characteristics of the model were determined for the take-off condition and for the condition with full wing-tip fuel tanks installed.
Date:
July 24, 1951
Creator:
Wilson, Jack H.
Object Type:
Report
System:
The UNT Digital Library
Charts Giving Critical Compressive Stress of Continuous Flat Sheet Divided Into Parallelogram-Shaped Panels
"Charts giving the compressive-buckling stress coefficients for sheet panels of a shape occurring in swept-wing plan forms are presented. The panels are assumed to be a part of a continuous flat sheet divided by nondeflecting supports into parallelogram-shaped areas. The stability analysis was performed by the energy method and the results show that, over a wide range of panel aspect ratio, such panels are decidedly more stable than equivalent rectangular panels of the same area" (p. 1).
Date:
July 1951
Creator:
Anderson, Roger A.
Object Type:
Report
System:
The UNT Digital Library
Application of X-Ray Absorption to Measurement of Small Air-Density Gradients
Report presenting an analysis of two x-ray absorption methods for determining small air-density gradients. One method uses a Geiger-Mueller counter for detection and the other uses photographic film for detection. Both of the methods are found to have some advantages and disadvantages.
Date:
July 1951
Creator:
Weltmann, Ruth N.; Fairweather, Steven & Papke, Daryl
Object Type:
Report
System:
The UNT Digital Library
Evaluation of the reduced-mass method of representing wing-lift effects in free-fall drop tests of landing gears
Report presenting an investigation of the validity of the reduced-mass method of representing wing-lift effects in free-fall drop tests of landing gears by means of tests of a small landing gear in the impact basin. The free-fall drop tests with full weight produced excessive values of load factor, impact period, strut stroke, mass travel, and impact energy.
Date:
July 1951
Creator:
Milwitzky, Benjamin & Lindquist, Dean C.
Object Type:
Report
System:
The UNT Digital Library
Vaporization rates and heat-transfer coefficients for pure liquid drops
Report presenting an investigation to determine the vaporization rates of pure liquid drops vaporizing under conditions similar to those encountered in aircraft combustion systems using a heat-balance equation. Results regarding the analysis and experimental results are provided.
Date:
July 1951
Creator:
Ingebo, Robert D.
Object Type:
Report
System:
The UNT Digital Library
Preliminary Study of Stability of Flow From Two Ducts Discharging Into a Common Duct
Note presenting an investigation of the instability of flow from two ducts that join into a common duct and of the influence of the various parameters on the phenomenon. A two-dimensional potential analysis was carried out under the assumption that the two ducts discharge into a region of constant pressure.
Date:
July 1951
Creator:
Bellin, Albert I.; Messina, D. Richard & Richards, Paul B.
Object Type:
Report
System:
The UNT Digital Library
An Investigation of Aircraft Heaters 35: Thermocouple Conduction Error Observed in Measuring Surface Temperatures
Note presenting experimental results that verify an analysis of errors occurring when thermocouples are used to measure the temperature of surfaces exposed at temperatures different from that of the surface. The data indicate that the electrical insulation of the wires is not effective in reducing the errors involved when the thermocouples are placed normal to the surface and exposed to the ambient fluids.
Date:
July 1951
Creator:
Boelter, L. M. K. & Lockhart, R. W.
Object Type:
Report
System:
The UNT Digital Library
Analytical Investigation of Fully Developed Laminar Flow in Tubes With Heat Transfer With Fluid Properties Variable Along the Radius
"In the analytical investigation reported herein, which was conducted in the NACA Lewis laboratory, both velocity and temperature distribution are obtained for fully developed laminar flow in tubes of gases and of liquid metals with variable fluid properties" (p. 1).
Date:
July 1951
Creator:
Deissler, Robert G.
Object Type:
Report
System:
The UNT Digital Library
Theoretical study of some methods for increasing the smoothness of flight through rough air
Report presenting a theoretical study of the response to gusts and stability and control characteristics of an airplane equipped with systems in which wing flaps and elevators are operated to reduce accelerations in rough air. The surfaces are actuated by an automatic control system in response to indications of an angle-of-attack vane or accelerometer.
Date:
July 1951
Creator:
Phillips, William H. & Kraft, Christopher C., Jr.
Object Type:
Report
System:
The UNT Digital Library
Summary of Methods for Calculating Dynamic Lateral Stability and Response and for Estimating Lateral Stability Derivatives
"A summary of methods for making dynamic lateral stability and response calculations and for estimating the aerodynamic stability derivatives required for use in these calculations is presented. The processes of performing calculations of the time histories of lateral motions, of the period and damping of these motions, and of the lateral stability boundaries are presented as a series of simple straightforward steps. Existing methods for estimating the stability derivatives are summarized and, in some cases, simple new empirical formulas are presented" (p. 1).
Date:
July 1951
Creator:
Campbell, John P. & McKinney, Marion O.
Object Type:
Report
System:
The UNT Digital Library
System Analyses and Autopilot Design for Automatic Roll Stabilization of a Supersonic Pilotless Aircraft
Memorandum presenting system analyses and autopilot design procedure for a supersonic pilotless aircraft with twin jet engines. The autopilots investigated were a gyro-actuated control, a gyro-actuated control with a rate-sensing device, and an electronic-hydraulic autopilot. Results regarding the airframe and gyro-actuated control system; airframe, gyro-actuated control, and rate servo; airframe and electronic-hydraulic autopilot; and contribution of method of analysis to system design are provided.
Date:
July 11, 1951
Creator:
Zarovsky, Jacob
Object Type:
Report
System:
The UNT Digital Library
Oil-Shale Operations in New South Wales, Australia
Report issued by the U.S. Bureau of Mines on the oil-shale operations at New South Wales, Australia in 1947. The methods, and types of equipment used are presented. The report includes maps, photographs, and illustrations of the oil-shale refinery.
Date:
July 1951
Creator:
Kraemer, A. J. & Thorne, H. M.
Object Type:
Report
System:
The UNT Digital Library
Estimate of Known Recoverable Reserves of Coking Coal in Armstrong County, Pennsylvania.
Report issued by the U.S. Bureau of Mines on the estimates of known reserves of coking coal deposits in Armstrong County, Pennsylvania. The properties of coal and coal blends from the area are presented. The report includes tables and maps.
Date:
July 1951
Creator:
Dowd, James J.; Turnbull, Louis A.; Toenges, Albert L.; Abernethy, R. F. & Reynolds, D. A.
Object Type:
Report
System:
The UNT Digital Library
National Motor-Gasoline Survey: Winter 1950-51
Report issued by the U.S. Bureau of Mines on the motor fuel sold in the U.S. during the winter of 1950-1951. Analysis of properties and trend characteristics of the fuel samples are presented. This report includes tables, graphs, and a map.
Date:
July 1951
Creator:
Blade, O. C.
Object Type:
Report
System:
The UNT Digital Library
Texas Attorney General Opinion: V-1200
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Price Daniel, regarding a legal question submitted for clarification: Whether county may issue bonds or time warrants for the purpose of purchasing fire fighting equipment to furnish protection to citizens residing outside limits of incorporated cities and towns.
Date:
July 6, 1951
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: V-1201
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Price Daniel, regarding a legal question submitted for clarification: Constitutionality and mandatory or descretionary character of Senate Bill 444, Acts 52nd Legislature, authorizing appointment of a stenographer and provision of office space for the District Attorney of the 100th Judicial District.
Date:
July 6, 1951
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: V-1202
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Price Daniel, regarding a legal question submitted for clarification: The tax situs of personal property owned by a resident of San Augustine County and located in an adjoining county.
Date:
July 9, 1951
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: V-1203
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Price Daniel, regarding a legal question submitted for clarification: Authority of the commissioners' court to open a neighborhood road under the submitted facts.
Date:
July 9, 1951
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: V-1204
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Price Daniel, regarding a legal question submitted for clarification: Legality of refunding lease rental payments made during pendency of litigation relating to the validity of such lease or the authority of the Land Commissioner to lease the land covered thereby.
Date:
July 12, 1951
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History